Preprints
https://doi.org/10.5194/os-2021-15
https://doi.org/10.5194/os-2021-15

  18 Feb 2021

18 Feb 2021

Review status: a revised version of this preprint was accepted for the journal OS and is expected to appear here in due course.

Estimating the Absolute Salinity of China Sea Using Nutrients and Inorganic Carbon Data

Fengying Ji1, Rich Pawlowicz2, and Xuejun Xiong3 Fengying Ji et al.
  • 1National Marine data and information service, Tianjin, 300171, China
  • 2Department of Earth and Ocean Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
  • 3First institute of oceanography, ministry of natural resources, Qingdao, 266001, China

Abstract. In June 2009, the Intergovernmental Oceanographic Commission of UNESCO released the international thermodynamic equation of seawater – 2010 (TEOS-10 for short) to define, describe and calculate the thermodynamic properties of seawater. Compared to the Equation of State-1980 (EOS-80 for short), the most obvious change with TEOS-10 is the use of Absolute Salinity as salinity argument, replacing the Practical Salinity used in the oceanographic community for 30 years. Due to the lack of observational data, the applicability of the potentially increased accuracy in Absolute Salinity algorithms for coastal and semi-enclosed seas is not very clear to date. Here, we discuss the magnitude, distribution characteristics and formation mechanism of Absolute Salinity and Salinity Anomaly in Chinese shelf waters, based on the Marine Integrated Investigation and Evaluation Project of China Offshore and other relevant data. The Absolute Salinity SA ranges from 0.1 to 34.66 g·kg−1. Instead of silicate, CaCO3 originating from terrestrial input and re-dissolution of shelf sediment is most likely the main composition anomaly relative to SSW and the primary contributor to the Absolute Salinity Anomaly δSA. Finally, relevant suggestions are proposed for the accurate measurement and expression of Absolute Salinity of the China offshore.

Fengying Ji et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on os-2021-15', Anonymous Referee #1, 05 Mar 2021
    • AC1: 'Reply on RC1', fengying Ji, 08 Mar 2021
  • RC2: 'Comment on os-2021-15', Paul Barker, 09 Mar 2021
  • RC3: 'Comment on os-2021-15', Anonymous Referee #3, 29 Mar 2021
  • EC1: 'Comment on os-2021-15', Trevor McDougall, 26 Apr 2021
    • AC4: 'Reply on EC1', fengying Ji, 27 Apr 2021

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on os-2021-15', Anonymous Referee #1, 05 Mar 2021
    • AC1: 'Reply on RC1', fengying Ji, 08 Mar 2021
  • RC2: 'Comment on os-2021-15', Paul Barker, 09 Mar 2021
  • RC3: 'Comment on os-2021-15', Anonymous Referee #3, 29 Mar 2021
  • EC1: 'Comment on os-2021-15', Trevor McDougall, 26 Apr 2021
    • AC4: 'Reply on EC1', fengying Ji, 27 Apr 2021

Fengying Ji et al.

Fengying Ji et al.

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Short summary
Based on the near-synchronous oceanographic and ocean chemical data from 2006 to 2007, the present manuscript shows the magnitude, distribution characteristics, and formation mechanism of Absolute Salinity in China offshore. These results are valuable supplements for the new worldwide standard for oceanography, the international Thermodynamic Equation of Seawater-2010 in which the Absolute Salinity algorithm is not very clear to date in the offshore and semi-closed sea due to the lack of data.